Apparatus for purifying water by ozone.



0. S. BRADLEY.

APPARATUS FOR PURIFYING WATER BY OZONE.

APPLICATION FILED JUNE 19, 1905.

2 SHEETS-SHEET 1.

Patented June 27, 1911.

G. S. BRADLEY.

APPARATUS FOR PURIPYING WATER BY OZONE.

APPLIOATION FILED JUNEIQ 1905.

Patented June 27, 1911.

2 SHEETS-SHEET 2.

\ sax I of water by means of ozone.

CHARLES S. BRADLEY,.OF NEW YORK, N. Y., ASSIGNOR TO NEW YORK, N. Y.

AI PPABATUS FOR PURIFYIN G WATER BY OZONE.

To all whom it may concem:

Be it known that I, CHARLES S. BRADLEY, a citizen of the United States, resident of the borough of Manhattan, city and State of 5 New York, have invented certain new and useful Improvements in Apparatus for Purifying Water by Ozone, of which the following is a specification.

My invention relates to the sterilization The object of my invention is to combine in asingle system an eflicient means for producing ozone, means for bringing the ozone produced into intimate contact with the water tobe sterilized and means. for preparing air for ozonization.

In my system I have combined a series of individual devices for eral features of the process each peculiarly 26 adapted to its work in combination with the others so that the entire system or apparatuscomprises a combination of elements, all cooperating to produce the desired result, and

each one assisting the other in addition to 2'5 doing its own work.

In order to avoid the necessity of purifying too large a quantity of air, I have arranged and operate my improved apparatus in such a manner thatthe same air, or at 30 least the greater portion of the same air, is used over and over again, only so much new air being admitted into the system at each cycle as will supply the required amount of oxygen to make up for the ozone which has been removed during the cycle by the oxidation of the carbonaceous impurities in the water being treated.

In general, my system may be described as comprising a water tower in which ozon- 40 ized air is isothermally compressed by and comes into intimate contact with'the Water being treated; a separating chamber in which the air and ozone, together with the carbon-dioxid and other obnoxious gases are allowed to rise from the water; a lime chamber or tower into which the gases rising from the separating chamber are discharged and through which they pass and wherein the carbon-dioxid is removed from the air; a compressed air engine suitably connected with the compressed air coming off of the lime tower and operated by the expansion of said air whereby the air is allowed to do workmpon an operating shaft and is thus cooled and dried; and finally, v,

Specification of Letters Patent.

. the ozone performing the sev- Patented J une 27, 1911.

Application filed June 19, 1905. Serial No. 285,920.

producing apparatus into which the air thus cooled and dried is allowed to pass for the purpose of having its oxygen converted into ozone. In'a-ddition to these general features, my system comprises a suitable inlet for additional air which, as above mentioned, I supply to the apparatus at each cycle to compensate for the ozone taken up by the carbonaceous impurities of the Water.

My invention is illustrated in the accompanying drawings, in'which,

Figure 1 is a schematic representation of the entire system, and Fig. 2 is a similarview showing the form of apparatus used when it is necessary to supply a greater proportion of ozone to the water.

Referring to said drawings, 10 designates a. water tower which has in its upper end a casting 11 through which the water to'be treated enters and into which a plurality of air jet tubes 12 penetrate. These air ,jet tubes 12 receive the ozonized air from a surrounding receptacle 13, whichis supplied with ozonized air in a manner hereinaftertobedescribed. The column 10 may be about 30 feet in depth, though I do not wish to limit my apparatus to the use of a water column of any given length. Water asses down the tower 10 and arrives at the bottom in a shown, forms an enlargement of the water the discharge water tower 15 which may of any suitable height, somewhat less than that of the water tower 10 and which dis charges the water which has now been'sterilized into suitable mains or reservoirs. The descent of the water into the column 10, through casting 11, past the inner ends of the air jet tubes 12, sucks in the ,ozonized air from the-receptacle 13 in small bubbles so that the ozonized air is thoroughly mixed with the water and carried down through the column 10. Of course, the descent of the water through the column 10 must be sullicien'tly rapid to prevent the bubbles of the ozonized air from rising in the column and escaping. As the water containing the hubbles of ozonized air gradually drops in the column, the pressure on the gas correspondingly increases so that by the time the bubbles in the water have reached the bottom of the column, the pressure of the air has been RICHARD EB, WILSON, OF

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separating chamber 14 which, as clearly tower and has a dome-shaped roof. From here the water passes on upwardly throng:

raised'perhaps threeuarters of an atmosphere. The heatingp the gas due to the increase of pressure is almost entirely counterbalanced by the fact that the water being such a good absorbent and having such a I because increased pressure assists the ozone inits action upon water. Furthermore the increased pressure is subsequently used to enable the cooling and drying of the gas, as

will be hereinafter shown. For this. purpose, it will be obvious thatthe initial compression of the gas should be isothermal. When the water and ozonized air reach the l chamber 14 it is obvious that as the water is now traveling horizontally and has, for the time being, no vertical travel, the re- ZQL-s'ultant gas will rise from the water and collect under the dome-shaped roof of the separating chamber 14. This gas will probably consist mostly of air, together with asmall quantity of remaining ozone, a slight amount of moisture and carbon-dioxid resulting from the oxidation of the carbonaceous impurities. Therefore to suitably remove the undesirable portions of the gas, I lead the composite, gas, .Which is now under raised pressure, through the vertical tube 16 0 ening throu h the downwardly turned nec 17 into the limetower 18. The lime tower 18 has at top and bottom respectively, manholes 19 and 20 for inserting and'removing' the lime with which the tower is filled and also has at the bottom. a water drawoflI' faucet 21 to remove the water which collects in the bottom of this tower. The composite.

gas in passing through the lime chamber is deprived of its acid constituent, carbondioxid and, what little moisture is present, and the gas which now consists probably only of air, with a trace of remaining ozone, together with whatever moisture may lie present init, passes out at the top through the pipe 22. The air, which it should be remembered, is still under compression, is now delivered to the compressed air engine 23 which is suitably connected by piston rod 24, link 25' and crank 26 with the work shaft 27 which may be allowed to operate some part of the complete apparatus, such for instance, as the pump or the dynamo. The compressed air in doing work upon the shaft 27 loses its pressure and is cooled, also losing itsmoisture. Thus the air is cooled and dried and is then in excellent condition for having its oxygen converted to ozone. The air in this condition leaves the compressed air engine 23 by the pipe 28 which has opening into it a suitable air inlet 29 for adding a small quantity of new air to the system, and passes on into the ozone producer 30. This ozone producer comprises in general two glass plates or disks 31 and 32 on the. backs of which are placed sheets of tinfoil 33 and 34 which serve as electrodes and to which are attached wires 35 and 36 suitably insulated from the casing of the ozone producer at 37 and 38 and connected with the secondary 39 of the transformer. The primary coil 40 of the transformer is supplied with current through the wires 41 and 42, suitably connected to the brush pieces 43 and 44 of the alternator 45. The alternator 45 should be capable of givingv a current of great frequency and high voltage. The specific construction of the ozone producing circuit, however, does not form a part of the present invention. It will be seen that the air which has been cooled and dried and renewed passes from the pipe 28 through the space between the glass plates 31 and 32 and. finds its only escape by the tube 46 which extends around and opens into the receptacle 13, already described. As the water passes down through the casting 11, it creates a reduced pressure in the receptacle 13, thereby causing a circulation of the air enriched with the ozone through the pipe 46 from the ozone producer 30.

In some instances, it will be found that the water requires a much greater amount of ozone to produce the desired sterilization and in these cases the apparatus will comprise the general system shown in Fig. 2. As illustrated, the system here comprises a series of water towers 10, 10 10, similar to the above described water tower 10. Any

. suitable number may be used as the particular case demands. I have shown only three. These water towers are connected in series by the outlet towers 15 15 and 15, the water towers 10 10, and 10, being providedat their tops with ozonized air receptacles 13, 13 and 13, into which lead the pipes 46, 46 and 46, connected in parallel from the main ozonized air pipe 46. Each series has a corresponding separating chamber 14, 14 and 14, from which lead the pipes 16, 16 and 16 which discharge into the main takeoff 16. The pipe 16 discharges the gas from all the towers into a common lime tower 18, the same as that shown in Fig. 1, and from this the takeoff pipe 22 discharges the gas into the compressed air part of the system not only performs its own particular Work, but also does something toward helping the other elements to do their work. For instance, the mixing tower 10 also assists the air cooling means, because it compresses the air and thus uts it in the condition in which the air coo ing means, i. 'e. the compressed air engine, can work its efl ect u on it.

Having thus escribed my invention, the following is what I claim as new therein and desire to secure by Letters Patent:

1. The combination with means for sup.- plying water and means for supplying ozone, of means for materially compressing said ozone by the water while-in said water.

2., The combination with means for supplying water and means for producing ozone, of means for introducing sa1 d ozone into said water, means for materially compressing said ozone isothermally in said water by the water, means for separating the resultant gas under pressure from said water, means for expanding said compressed resultant gas adiabatically and means for returning the Water, means for separating the resultant gas, under compression from the water,

means for removing the CO, from the resultant gas, means for expandlng the remaining gas adiabaticall and means for returning the gas to sai means.

ozone producing CHARLES S, BRADLEY. Witnesses:

O. KNIGHT, Jr., 7 HENRY G. WORKMAN. 

